新疆库鲁克塔格西段青白口纪末期伸展构造  

Extensional Structures of the Late Qingbaikou in the Western Segment of Quruqtagh,Xinjiang

作　　者：金建斌[1] 郭瑞清[1] 木合塔尔.扎日 王克卓 朱志新[1,2] 

机构地区：[1]新疆大学地质与矿业工程学院,新疆乌鲁木齐830049 [2]新疆维吾尔自治区地质调查院,新疆乌鲁木齐830011

出　　处：《新疆地质》2016年第2期164-169,共6页Xinjiang Geology

基　　金：中国地质调查局新疆兴地塔格阿匍口地区1:5万(K45E014010;K45E014011;K45E015010;K45E015011;K45E016011)等5幅区调(1212011120477)资助

摘　　要：系统分析记录库鲁克塔格地块西段青白口系及古元古代基底顶部构造样式,认为其变形组合特征总体反映了NW向顺层拆离滑脱构造机制。青白口系顶部卷入变形流纹岩及南华系底部未变形流纹岩测年数据显示,本次滑脱构造变形时代限定在(841.0±1.4)Ma^(738.9±5.4)Ma,表明构造变形可能对应Rodinia超大陆裂解事件,为此次构造事件塔里木东北缘地壳变形记录。Systematic study on the structural styles recording in the Qingbaikou system and the Paleoproterozoic basalin the western segment of Quruqtagh indicates,that their deformation assemblages characteristics are overall reflect thestructural mechanism of bedding sliding from NW to SE.The age of the rhyolite in the top of the Beisainartag Formationwhich involved in the deformation and the age of the rhyolite in the base of Nanhuan system which didn’t involved inthe deformation indicates that the deformation time interval of this decollement structure movement are （841.5±2.3）Mato （736 ±3.1）Ma.It is indicated that the tectonic movement might be the record of the early crustal deformation in thenortheastern tarim edge,in the breaking up period of the Rodinia supercontinent.

关 键 词：库鲁克塔格西段 新元古代 伸展构造 

分 类 号：P542[天文地球—构造地质学]